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If water has a boiling point of ~100 degrees C, why does it evaporate at room temperature?
Compute the pH of 0.100L of a buffer solution that is 0.25M in HF and .50M in NaF. Explain what is the change in pH on addition of the following
Problem- Why is mixtures of alcohol and water used, ratherthan simply water itself, to saponify the fat or oil to produce soap
In a lab you need 1.0M, 0.1M, and 0.05M Cu2+. How could you make 50.0mL of each of these three solutions with only 10.0g of Cu(NO3)2 available
pairs of soluble solutions can be mixed. In some cases, this leads to the formation of an insoluble precipitate. Decide, in each case, whether or not an insoluble precipitate is formed.
In preparing the sodium thiosulfate solution, the solid Na2S2O3x5H2O is not dried. Will this oversight cause the reported molar concentration of the standard Na2S2O3 solution to be too high, too low or unaffected? Explain.
0.5g KCl was dissolved in 100g water and the solution originally at 200C, froze at - 0.240C. Calculate the percentage ionization of salt. Kf per 1000g of water = 1.86K
The thallium (present as Tl2SO4) in a 9.043 g pesticide sample was precipitated as thallium(I) iodide. Calculate the mass percent of Tl2SO4 in the sample if 0.3524 g of TlI was recovered.
Question- 1) What is the X-Se-X bond angle, here X represents the outer atoms in each of the following molecules
what is the oxidation number of the specified element in each compound or polyatomic ion: a)C in ZnCO3 b)Fe i Fe(NO3)2 c)Cl in ClF4^- d)S in S2O3^2-
Sulfuric acid is a component of acid rain formed when gaseous sulfur dioxide pollutant reacts with gaseous oxygen and liquid water to form aqueous sulfuric acid.
calculate the moles of calcium carbonate present in a 25.00 ml sample of standard assuming the standard is known to
What is the empirical formula of this compound. If, for example, the compound was C2Cl3F, then one would input `C2Cl3F' - no spaces, no commas, proper case for the letters in the atomic symbols, and alphabetical order of the elements is required h..
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